"The U. S. Environmental Protection Agency (EPA) sets standards and regulations for many different contaminants in public drinking water, including disease-causing germs and chemicals."
"The
Safe Drinking Water Act (SDWA) was passed by Congress in 1974, with amendments added in 1986 and 1996, to protect our drinking water. Under the SDWA, EPA sets the standards for drinking water quality and monitors states, local authorities, and water suppliers who enforce those standards. As part of the SDWA, EPA has set maximum contaminant levels, as well as treatment requirements for over
90 different contaminants in public drinking water."
"National Primary Drinking Water Regulations (NPDWR) are standards and treatment techniques that public water systems must follow. These regulations protect public health by limiting
contaminant levels in drinking water."